mac arp moved from-to DOS?
Tom Ierna
tom at shockergroup.com
Fri Apr 3 17:59:14 PDT 2009
On Apr 3, 2009, at 7:11 PM, Anuj Singh wrote:
> 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from 00:22:19:ae:ea:0d
> to 00:22:19:ae:ea:0f on age0
> Apr 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from
> 00:22:19:ae:ea:0f to 00:22:19:ae:ea:0d on age0
>
> 10.139.7.15 is some windows machine...
Does this Windows machine have two Ethernet cards plugged into the
same network?
It looks like your FreeBSD machine is seeing that IP address switch
between two MAC addresses.
This can be indicative of a network loop between the interfaces on the
machine with that IP address, or a DHCP client fight.
I've also seen this (harmlessly) manifest with certain FreeBSD
firewalls in bridged mode.
-Tom
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